问高亮当前鼠标位置

EN

/*
 * https://github.com/arp242/find-cursor
 * Copyright © 2015 Martin Tournoij <martin@arp242.net>
 * See below for full copyright
 */

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>

#include <X11/Xlib.h>
#include <X11/Xutil.h>


// Some variables you can play with :-)
int size = 220;
int step = 40;
int speed = 400;
int line_width = 2;
char color_name[] = "black";


int main(int argc, char* argv[]) {
    // Setup display and such
    char *display_name = getenv("DISPLAY");
    if (!display_name) {
        fprintf(stderr, "%s: cannot connect to X server '%s'\n", argv[0], display_name);
        exit(1);
    }

    Display *display = XOpenDisplay(display_name);
    int screen = DefaultScreen(display);

    // Get the mouse cursor position
    int win_x, win_y, root_x, root_y = 0;
    unsigned int mask = 0;
    Window child_win, root_win;
    XQueryPointer(display, XRootWindow(display, screen),
        &child_win, &root_win,
        &root_x, &root_y, &win_x, &win_y, &mask);

    // Create a window at the mouse position
    XSetWindowAttributes window_attr;
    window_attr.override_redirect = 1;
    Window window = XCreateWindow(display, XRootWindow(display, screen),
        root_x - size/2, root_y - size/2,   // x, y position
        size, size,                         // width, height
        0,                                  // border width
        DefaultDepth(display, screen),      // depth
        CopyFromParent,                     // class
        DefaultVisual(display, screen),     // visual
        CWOverrideRedirect,                 // valuemask
        &window_attr                        // attributes
    );
    XMapWindow(display, window);
    XStoreName(display, window, "find-cursor");

    XClassHint *class = XAllocClassHint();
    class->res_name = "find-cursor";
    class->res_class = "find-cursor";
    XSetClassHint(display, window, class);
    XFree(class);

    // Keep the window on top
    XEvent e;
    memset(&e, 0, sizeof(e));
    e.xclient.type = ClientMessage;
    e.xclient.message_type = XInternAtom(display, "_NET_WM_STATE", False);
    e.xclient.display = display;
    e.xclient.window = window;
    e.xclient.format = 32;
    e.xclient.data.l[0] = 1;
    e.xclient.data.l[1] = XInternAtom(display, "_NET_WM_STATE_STAYS_ON_TOP", False);
    XSendEvent(display, XRootWindow(display, screen), False, SubstructureRedirectMask, &e);

    XRaiseWindow(display, window);
    XFlush(display);

    // Prepare to draw on this window
    XGCValues values;
    values.graphics_exposures = False;

    unsigned long valuemask = 0;
    GC gc = XCreateGC(display, window, valuemask, &values);

    Colormap colormap = DefaultColormap(display, screen);
    XColor color;
    XAllocNamedColor(display, colormap, color_name, &color, &color);
    XSetForeground(display, gc, color.pixel);
    XSetLineAttributes(display, gc, line_width, LineSolid, CapButt, JoinBevel);

    // Draw the circles
    for (int i=1; i<=size; i+=step) { 
        XDrawArc(display, window, gc,
            size/2 - i/2, size/2 - i/2,   // x, y position
            i, i,                         // Size
            0, 360 * 64);                 // Make it a full circle

        XSync(display, False);
        usleep(speed * 100);
    }
    XFreeGC(display, gc);
    XCloseDisplay(display);
}


/*
 *  The MIT License (MIT)
 * 
 *  Copyright © 2015 Martin Tournoij
 * 
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to
 *  deal in the Software without restriction, including without limitation the
 *  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 *  sell copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 * 
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 * 
 *  The software is provided "as is", without warranty of any kind, express or
 *  implied, including but not limited to the warranties of merchantability,
 *  fitness for a particular purpose and noninfringement. In no event shall the
 *  authors or copyright holders be liable for any claim, damages or other
 *  liability, whether in an action of contract, tort or otherwise, arising
 *  from, out of or in connection with the software or the use or other dealings
 *  in the software.
 */